Efficient bandwidth allocation scheme for wireless networks using relay stations

With the advance of wireless communications technologies, it has been proved that the usage of relay stations can improve the transmission rate and enlarge the coverage. The present usage of relay stations (RS) focus on retransmitting signal to the destination to ensure the correctness of signal. In this paper, we propose a novel relay transmission scheme and consider in using the bandwidth between the BS and RS for relaying the required data of User Equipments (UEs). In order to use the bandwidth resource efficiently, our proposed scheme considers the transmission time of the UEs under different requirement of data and assigns the bandwidth resource to reduce the overall transmission time. The simulation results show that our proposed scheme can reduce the overall transmission time noticeably compared to the method that does not assign the bandwidth resource.